registry / Remote code execution / devplatform-spa-plugin-s3-feature-toggle
devplatform-spa-plugin-s3-feature-toggle
Devplatform spa plugin s3 feature toggle abstraction layer
This report shows the evidence for devplatform-spa-plugin-s3-feature-toggle@35.7.1, the only known version.
This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is a concrete, hidden import-time remote-code-execution chain unrelated to the advertised feature-toggle API. No install hook is required for the payload to execute once the package is loaded.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of the package main entrypoint.
Impact
Arbitrary attacker-controlled code can execute as the importing user.
Mechanism
import-time remote binary download, drop, and detached execution
Attack narrative
The main entrypoint silently imports _runtime.js. Its immediately invoked bootstrap selects a platform payload URL, downloads bytes from concealed Workers hosts or reconstructs them through DNS TXT records, writes the bytes to a temporary executable-named file, makes Unix files executable, and launches them detached via a shell or cmd.exe. This occurs on ordinary package import without user configuration.
AI rationale
This is a concrete, hidden import-time remote-code-execution chain unrelated to the advertised feature-toggle API. No install hook is required for the payload to execute once the package is loaded.
Evidence
package.jsonindex.js_runtime.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf103-070.workers.devoob-worker.cf102-baf.workers.devoob-worker.cf101-adf.workers.devsdk.dl.wel1.ru
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js:23 imports _runtime.js on every package import.
- _runtime.js:73-87 downloads opaque bytes over HTTPS.
- _runtime.js:92-118 can retrieve a base64 payload via DNS TXT.
- _runtime.js:168-174 writes, chmods, and detached-spawns the payload.
- _runtime.js:23-43 hides remote worker and DNS domains through string splitting.
- _runtime.js:142 creates a timestamp marker to suppress repeat execution.
Evidence against
- package.json has no lifecycle scripts.
- lib/telemetry.js is not imported by the package entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_runtime.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const MAX_AGE = 23224;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_runtime.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _runtime.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const MAX_AGE = 23224;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_runtime.jsView on unpkg · L3Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_runtime.js
CriticalTrigger Reachable Dangerous Capability_runtime.js
HighChild Process_runtime.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-spa-plugin-s3-feature-toggle@35.7.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-spa-plugin-s3-feature-toggle@35.7.1. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.